1998997

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1997}}^1$

素因数の和:2028

約数の個数: 16

約数和(自身を含む): 2685312

約数和(自身を除く): 686315

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 1997, 13979, 21967, 25961, 153769, 181727, 285571, 1998997]

約数ペア:

[(1, 1998997), (7, 285571), (11, 181727), (13, 153769), (77, 25961), (91, 21967), (143, 13979), (1001, 1997)]